Add support for PPC and PPC64 multiarch toolchains on Debain.

Patch from Michel Dänzer, sent our way via Jeremy Huddleston who added
64-bit support. I just added one other place where powerpc64-linux-gnu
was missing (we only had powerpc64-unknown-linux-gnu).

I've also added a tree to test out the debian multiarch stuff. I don't
use debian regularly, so I'm not certain this is entirely accurate. If
anyone wants to check it against a debian system and fix any
inaccuracies, fire away. This way at least folks can see how this is
*supposed* to be tested.

It'd be particularly good to get the Debian MIPS toolchains tested in
this way.

llvm-svn: 151482

clang/lib/Driver/ToolChains.cpp

@@ -1219,6 +1219,7 @@ Generic_GCC::GCCInstallationDetector::GCCInstallationDetector(
   };
   static const char *const PPC64LibDirs[] = { "/lib64", "/lib" };
   static const char *const PPC64Triples[] = {
+    "powerpc64-linux-gnu",
     "powerpc64-unknown-linux-gnu",
     "powerpc64-suse-linux",
     "ppc64-redhat-linux"
@@ -1962,6 +1963,14 @@ static std::string getMultiarchTriple(const llvm::Triple TargetTriple,
     if (llvm::sys::fs::exists(SysRoot + "/lib/mipsel-linux-gnu"))
       return "mipsel-linux-gnu";
     return TargetTriple.str();
+  case llvm::Triple::ppc:
+    if (llvm::sys::fs::exists(SysRoot + "/lib/powerpc-linux-gnu"))
+      return "powerpc-linux-gnu";
+    return TargetTriple.str();
+  case llvm::Triple::ppc64:
+    if (llvm::sys::fs::exists(SysRoot + "/lib/powerpc64-linux-gnu"))
+      return "powerpc64-linux-gnu";
+    return TargetTriple.str();
   }
 }
 

clang/test/Driver/linux-ld.c

@@ -194,3 +194,54 @@
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS64EL %s
 // CHECK-MIPS64EL: "{{.*}}ld{{(.exe)?}}"
 // CHECK-MIPS64EL-NOT: "--hash-style={{gnu|both}}"
+//
+// Thoroughly exercise the Debian multiarch environment.
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target i686-linux-gnu \
+// RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-X86 %s
+// CHECK-DEBIAN-X86: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-DEBIAN-X86: "{{.*}}/usr/lib/gcc/i686-linux-gnu/4.5/crtbegin.o"
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5"
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5/../../../i386-linux-gnu"
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/usr/lib/i386-linux-gnu"
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5/../../.."
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/lib"
+// CHECK-DEBIAN-X86: "-L[[SYSROOT]]/usr/lib"
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-linux-gnu \
+// RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-X86-64 %s
+// CHECK-DEBIAN-X86-64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-DEBIAN-X86-64: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.5/crtbegin.o"
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5"
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5/../../../x86_64-linux-gnu"
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/usr/lib/x86_64-linux-gnu"
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5/../../.."
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/lib"
+// CHECK-DEBIAN-X86-64: "-L[[SYSROOT]]/usr/lib"
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target powerpc-linux-gnu \
+// RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-PPC %s
+// CHECK-DEBIAN-PPC: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-DEBIAN-PPC: "{{.*}}/usr/lib/gcc/powerpc-linux-gnu/4.5/crtbegin.o"
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5"
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5/../../../powerpc-linux-gnu"
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/usr/lib/powerpc-linux-gnu"
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5/../../.."
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/lib"
+// CHECK-DEBIAN-PPC: "-L[[SYSROOT]]/usr/lib"
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target powerpc64-linux-gnu \
+// RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-PPC64 %s
+// CHECK-DEBIAN-PPC64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-DEBIAN-PPC64: "{{.*}}/usr/lib/gcc/powerpc64-linux-gnu/4.5/crtbegin.o"
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5"
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5/../../../powerpc64-linux-gnu"
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/usr/lib/powerpc64-linux-gnu"
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5/../../.."
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/lib"
+// CHECK-DEBIAN-PPC64: "-L[[SYSROOT]]/usr/lib"
+//